Switch config to env variables
Proxy formList requests to a javarosa form server

See https://bitbucket.org/javarosa/javarosa/wiki/FormListAPI
Add some error checking
Test implementation of basic auth passthrough for Github
Update Realm name
Restructure persistance code
Reorganize xform parser
Correct config values for S3 auth
Add sensible defaults to config
Create Readme file
Only force request for auth when using Github as a store
Add error checking to proxying of formList server
Cleanup save code
Comment code
Little cleanups
Change how proxy response is piped
BUGFIX forgot to require stream library in s3 module
Add some additional logging for image and form saving
Improve XForm parsing and fix problem with filename replacement
Do not give ODK Collect client the OK until we are sure we have saved media to Amazon S3